Facile synthesis of visible light excited La1-xGdxF3:Eu3+ micro-meter sphere using polyvinylpyrrolidone as a template
来源期刊：JOURNAL OF RARE EARTHS2010年第S1期
论文作者：郑玉惠 刘帝清 王前明
文章页码：285 - 288
摘 要：Lanthanide fluorides exhibited unique luminescent properties in terms of their low phonon energy can restrict the luminescence quenching and extend luminescent lifetimes.Here,a room-temperature co-precipitation method was used to synthesize europium（III） activated La1-xGdxF3 solid phosphors.X-ray diffraction（XRD） data confirmed the crystalline phases of synthesized sample belongs to orthorhombic system.All the as-derived materials exhibited red luminescence（5D0→7F1） under the excitation at longer wavelengths（394 and 466 nm）.The powder with the most intense emission was achieved in terms of 10 mol.% doping concentration（Eu content,La/Gd=1/9） and sample sintered at 700 oC.Scanning electron microscopy（SEM） investigated the morphology and crystalline of the samples,showing that many regular and large balls（5-10 μmol/L） were dispersed within the micro-meter scale composites.We proved that the above crystal growth structures were controllable and predicable based on the surface functionalization by polyvinylpyrrolidone ligand.
郑玉惠，刘帝清，王前明
School of Chemistry and Environment,South China Normal University
摘 要：Lanthanide fluorides exhibited unique luminescent properties in terms of their low phonon energy can restrict the luminescence quenching and extend luminescent lifetimes.Here,a room-temperature co-precipitation method was used to synthesize europium（III） activated La1-xGdxF3 solid phosphors.X-ray diffraction（XRD） data confirmed the crystalline phases of synthesized sample belongs to orthorhombic system.All the as-derived materials exhibited red luminescence（5D0→7F1） under the excitation at longer wavelengths（394 and 466 nm）.The powder with the most intense emission was achieved in terms of 10 mol.% doping concentration（Eu content,La/Gd=1/9） and sample sintered at 700 oC.Scanning electron microscopy（SEM） investigated the morphology and crystalline of the samples,showing that many regular and large balls（5-10 μmol/L） were dispersed within the micro-meter scale composites.We proved that the above crystal growth structures were controllable and predicable based on the surface functionalization by polyvinylpyrrolidone ligand.
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